# Solid State Class 12-Practice Set

Solid-state is one of the important chapters for CBSE and ISC exams.Here I have provided you a Practice Set of the chapter.

Complete the Theory of this chapter (CLICK), Short Question and Answer (CLICK) and MCQ test (CLICK)

1. Fill in the blanks:
1. In a closed packed array of N spheres, the number of tetrahedral holes are _____ and the number of octahedral holes are ______.
2. The closest packing sequence ABCABC represent ______ centred and ____ packing.
3. Each unit cell of NaCl consists of ______ Cl ions and Na+ ions.
4. AgBr crystal shows both _______ and ________ defects.
5. The percentage of unoccupied spaces in fcc and bcc are _____ and ______ respectively.
2. Solve the following-
1. CsCl has a cubic structure. Eight corners are occupied by Cs + and Cl at the center or vice-versa. Calculate the interionic distance and the ratio of the radius of Cs+ to Cl. Molecular mass of CsCl= 168.36 and density is 3.97g/cm3.
2. A unit cell consists of a cube in which there are A atoms at the corners and B atoms at the face centers. Two A atoms are missing from the two corners of the unit cell. What is the formula of the compound?
3. The nearest neighbour Ag atoms in the Silver crystal are 2.87 x 10-8 cm apart. Presuming fcc structure of the crystal, what will be the density of the silver.
4. Al crystallises in a cubic close-packed structure with a metallic radius of 125 pm. Calculate the length of the side of the unit cell and how many unit cells are there in 1cc of Al?
3. Provide a difference between-
1. The n-type and p-type semiconductor
2. Octahedral and tetrahedral void
3. Ferromagnetic and Ferrimagnetic substance.